ADAPTING SAFETY DISC FOR HEAVY TRANSPORT VEHICLE
WHEEL RIM
FIELD OF INVENTION
[0001] The embodiments herein generally relate to adaptation of a safety disc
device for heavy transport vehicle wheel rims. More particularly, the invention
relates to a wheel mounted safety disc holder for off-highway construction or
earthmoving vehicle.
BACKGROUND AND PRIOR ART
[0002] A vehicle wheel comprises of a rim, a disc and a tire, wherein the tire is
inflated with air or nitrogen. There can be several reasons for excessive pressure
build-up that lead to tire bursts. Unregulated supply of air or nitrogen during tire
inflation at site conditions can lead to tire burst. Rock or any sharp object impacts
are one of the reasons for tire bursts during the service. The pressure retaining
capabilities of tire can be further reduced by fatigue or other physical damage.
These tire bursts can lead to dangerous disintegration of tire and rim assemblies
and associated accidents at site.
[0003] In order to overcome the aforementioned threatening cause and thereby to
release excess air pressure in tire cavity, a rupture disc, also known as burst disc
or bursting disc that is a non-reclosing pressure relief device is provided.
[0004] Conventionally the rupture disc is provided on separate NPT tapped hole
on a rim in addition to standard valve hole which creates difficulty to repair the
rim when damages are caused to NPT thread on the rims. Further, this limits the
possibility to retrofit to the rim at the site. Hence, the so far known configuration
and features of rupture disc may not be sufficient to overcome the challenge faced
with respect to flexibility and effective performance.

[0005] Therefore, there is a need to develop a safety disc holder to avoid potential tire burst and related accidents. Further, there is a need to develop a safety disc holder with provisions for tire inflation and rupture disc and that allows to release the excessive air pressure build-up and also that can be retrofit on an existing standard wheel rim at site without a need for any special machining.
OBJECTS OF THE INVENTION
[0006] Some of the objects of the present disclosure are described herein below:
[0007] A main object of the present invention is to provide a safety disc holder
with provisions for tire inflation and rupture disc.
[0008] Another object of the present invention is to provide a safety disc holder
that can be mountable at the site as a retrofit on a standard hole of the wheel rim
without a need for any special machining.
[0009] Still another object of the present invention is to provide a safety disc
holder to release the excessive air pressure in the tire cavity.
[00010] Yet another object of the present invention is to provide a safety disc
holder that can avoid potential tire burst and related accidents.
[00011] Another object of the present invention is to provide a safety disc holder
that comprises of a main housing, a valve core housing and a rupture disc unit.
[00012] Another object of the present invention is to provide a safety disc holder
that allows replacing the rupture disc unit when the rupture disc bursts due to
excess air pressure inside the cavity.
[00013] Another object of the present invention is to provide a safety disc holder
that prevents unauthorized removal or theft of the rupture disc unit at site.

[00014] The other objects and advantages of the present invention will be
apparent from the following description when read in conjunction with the
accompanying drawings, which are incorporated for illustration of preferred
embodiments of the present invention and are not intended to limit the scope
thereof.
SUMMARY OF THE INVENTION
[00015] In view of the foregoing, an embodiment herein provides a safety disc
holder in a vehicle wheel rim to avoid potential tire burst and related accidents.
The safety disc holder comprises of a main housing, a valve core housing and a
rupture disc unit. The main housing includes a male portion for mounting the
safety disc holder in the rim and provisions to receive the valve core housing and
the rupture disc unit. The main housing is configured to accept the valve core
housing for tire inflation and configured to accept the rupture disc unit for
preventing excess air pressure build-up.
[00016] According to an embodiment, the main housing further includes at least
three openings. The rupture disc unit is connected to a first opening of the main
housing, the valve core housing is connected to a second opening of the main
housing, and a third opening of the main housing is connected to the tire cavity
when the male portion of the main housing is mounted to a standard hole of the
rim.
[00017] According to an embodiment, the rupture disc unit includes a rupture disc
and a muffled outlet. The muffled outlet includes at least a cross hole on its
surface to release excess air to atmosphere. The rupture disc unit can be
replaceable when the rupture disc bursts due to excess air pressure inside the tyre
cavity.

[00018] According to an embodiment, the valve core housing includes a valve core housing seal and a swivel nut. The valve core housing seal is provided to establish an air tight seal between the valve core housing and the second opening of the main housing whereas the swivel nut provides strong connectivity between the valve core housing and the main housing.
[00019] According to an embodiment, the rim is provided with a standard hole for mounting the safety disc holder. In an embodiment, the safety disc holder further includes at least one spud, at least one rubber grommet, at least one lock nut and at least one static seal. The spud is provided with threads on its external and internal surfaces. The external thread is machined to match the lock nut and internal thread is machined to match threads on the main housing. [00020] According to an embodiment, the rubber grommet is placed over the external step of the spud. The spud with the rubber grommet is placed over the standard hole of the rim. The static seal is disposed at chamfer of the spud to provide an air tight seal across the spud and the main housing interface. [00021] According to an embodiment, a lock plate is disposed on top of the main housing to prevent unauthorized removal of rupture disc unit from the safety disc holder.
[00022] These and other aspects of the embodiments herein will be better appreciated and understood when considered in conjunction with the following description and the accompanying drawings. It should be understood, however, that the following descriptions, while indicating preferred embodiments and numerous specific details thereof, are given by way of illustration and not of limitation. Many changes and modifications may be made within the scope of the

embodiments herein without departing from the spirit thereof, and the embodiments herein include all such modifications.
BRIEF DESCRIPTION OF DRAWINGS
[00023] The detailed description is set forth with reference to the accompanying
figures. In the figures, the left-most digit (s) of a reference number identifies the
figure in which the reference number first appears. The use of the same reference
numbers in different figures indicates similar or identical items.
[00024] Fig. 1 illustrates a cross section view of a rim, according to an
embodiment of the present invention herein;
[00025] Fig. 2 (A) illustrates a sectional view of a safety disc holder, according to
an embodiment of the present invention herein;
[00026] Fig. 2 (B) illustrates a top view of the safety disc holder, according to an
embodiment of the present invention herein;
[00027] Fig. 2 (C) illustrates a sectional view of top portion of the safety disc
holder, according to an embodiment of the present invention herein;
[00028] Fig. 3 (A) illustrates an orthogonal view of the main housing, according
to an embodiment of the present invention herein;
[00029] Fig. 3 (B) illustrates an isometric view of the main housing, according to
an embodiment of the present invention herein;
[00030] Fig. 4 illustrates an isometric view of lock plate, according to an
embodiment of the present invention herein; and
[00031] Fig. 5 illustrates a sectional view of spud, according to an embodiment of
the present invention herein.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [00032] The embodiments herein and the various features and advantageous details thereof are explained more fully with reference to the non-limiting embodiments and detailed in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
[00033] As mentioned above, there is a need to develop a safety disc holder to avoid potential tire burst and related accidents. The embodiments herein achieve this by providing a safety disc holder with provisions for tire inflation and rupture disc and that allows releasing the excessive air pressure build-up when the air pressure inside the tire cavity increases beyond acceptable levels. Further, the safety disc holder can be retrofit on an existing standard wheel rim at site without a need for any special machining. Referring now to the drawings, and more particularly to Fig. 1 through Fig. 5, where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.
[00034] Fig. 1 illustrates a cross section view 100 of a rim 103, according to an embodiment of the present invention. The cross section view of the rim 103 includes a tire 101, a tire cavity 102, a safety disc holder 104 and a standard hole 105, which can be used to mount the safety disc holder 104 that leaves a possibility to retrofit at the site.

[00035] Fig. 2 (A) illustrates a sectional view 200 (A) of safety disc holder 104, according to an embodiment of the present invention. The safety disc holder 104 for avoiding potential tire bursts and related accidents in a vehicle wheel rim, wherein the safety disc holder 104 comprises of a main housing 201, a valve core housing 202 and a rupture disc unit 203, wherein the safety disc holder 104 can be mounted on to the standard hole 105 of the rim 103.
[00036] According to an embodiment, the main housing 201 includes a male portion and at least three openings that lead to proper orientation of safety disc holder 104. The rupture disc unit 203 is connected to a first opening 207 of the main housing 201, the valve core housing 202 is connected to a second opening 208 of the main housing 201 and the third opening of the main housing 201 is connected to the tire cavity 102 when the male portion of the main housing 201 is mounted to the standard hole 105 of the rim 103.
[00037]. According to an embodiment, the rupture disc unit 203 includes a rupture disc 204 and a muffled outlet 205. The muffled outlet 205 includes at least a cross hole 206 on its surface to release excess air to atmosphere. In an example, the rupture disc 204 can be a solid metal of very small thickness usually made of 316L grade stainless steel. The rupture disc 204 bursts when the air pressure inside the tire cavity rises beyond acceptable levels. The excess air pressure is released to atmosphere through the cross hole 206 provided in the surface of the muffled outlet 205. After the burst event, this resultant rupture disc unit 203 can be replaced with a new rupture disc unit 203 and which can be connected/coupled to the first opening 207 of the main housing 201.
[00038] According to an embodiment, the valve core housing 202 includes a valve core housing seal 210 and a swivel nut 211. The valve core housing seal 210

can establish an airtight seal between the valve core housing 202 and the second opening 208 of the main housing 201. The swivel nut 211 secures and thereby provides a strong connectivity between the valve core housing 202 and the main housing 201.
[00039] According to an embodiment, a lock plate 218 is disposed on top of the main housing 201 to prevent unauthorized removal of rupture disc unit 203 from the safety disc holder 104.
[00040] According to an embodiment, the safety disc holder 104 further includes a spud, a rubber grommet, a locknut and a static seal provided on top portion 200 (C) of the safety disc holder 104.
[00041] Fig. 2 (B) illustrates a top view 200 (B) of safety disc holder 104, according to an embodiment of the present invention. In an embodiment, the lock plate 218 is secured with the main housing 201 by set screws 217 at two tapped holes provided on mating surface of the main housing 201. [00042] Fig. 2 (C) illustrates a sectional view of the top portion 200 (C) of the safety disc holder 104, according to an embodiment of the present invention. In an embodiment, the safety disc holder further includes a spud 212, a rubber grommet 213, a lock nut 214 and a static seal 215. According to an embodiment, the rubber grommet 213 is placed on step of the spud 212. The spud 212 along with the grommet 213 is mounted on to the standard hole 105 of the rim 103 internally from the tire cavity 102 of the rim. The lock nut 214 is placed over external thread of the spud 212. A static seal 215 is disposed at chamfer of the spud 212 to provide an airtight sealing with the main housing 201. The third opening 209 (a) of the main housing 201 is connected to the tire cavity 102 when the male portion of the main housing 201 is mounted to the standard hole 105 of the rim 103. The

safety disc holder is secured by a main screw 216 that is driven into a threaded hole provided at mating surfaces of internal and external threads of the spud 212 and the main housing 201.
[00043] Fig.3 (A) illustrates an orthogonal view 300 (A) of the main housing 201, according to an embodiment of the present invention. In an embodiment, the main housing 201 is provided with threaded arrangements which acts as provisions for accepting the valve core housing 202 on one end and a rupture disc unit 203 on other end. The main housing 201 is configured to accept the valve core housing for tire inflation and configured to accept the rupture disc unit for preventing excess air pressure buildup inside the tire cavity. According to an embodiment, the rupture disc unit 203 is screwed on to the main housing 201 over the threads 301 provided on a side of the first opening 207, the valve core housing 202 is screwed on to the main housing 201 over the threads 302 provided on a side of the second opening 208 and the third opening 209 (a) of the main housing 201 is connected to the tire cavity 102 when the male portion 209 of the main housing 201 is mounted to the standard hole 105 of the rim 103. The male portion 209 of the main housing 201 is provided with mating threads 303 for smooth entering into the spud 212.
[00044] Fig.3 (B) illustrates an isometric view 300 (B) of the main housing 201, according to an embodiment of the present invention. In an embodiment, the lock plate 218 is secured with the main housing 201 by set screws 217 at two tapped holes 305 provided on the mating surface 305 of main housing 201. [00045] Fig. 4 illustrates an isometric view 400 of the lock plate 218, according to an embodiment of the present invention. In an embodiment, a lock plate 218 is provided with a circular opening 401 and a leg 402. The circular opening 401 of

the lock plate 218 is passed over the muffled outlet 205 of the rupture disc unit 203 and the leg 402 of the lock plate 218 is placed on the mating surface 305 of main housing 201. The lock plate 218 is secured with the main housing 201 by set screws 217 at the two tapped holes 305 provided on the mating surface 305 of main housing 201. With the safety disc holder 104 mounted on to the standard hole 105 of the rim 103, the provision of lock plate 218 can prevent the unauthorized removal of rupture disc unit 203 at site. Removal of rupture disc unit 203 from the main housing 201 is possible only after complete removal of main housing 201 from the rim 103.
[00046] Fig. 5 illustrates a sectional view of the spud, according to an embodiment of the present invention. According to an embodiment, the spud 212 includes a mating surface 501, at least a mating thread 502, at least a chamfer 503 and at least an external thread 504. The main housing 201 is entered into the mating thread of the spud 502 completely in such a way that the both mating surface 305 of the main housing 201 and 501 of the spud 212 touches each other. This ensures the air tight sealing of the leak path between the mating thread 502 of the spud 212 and mating thread 303 of the main housing 201. The static seal is placed on the chamfer 503 of the spud 212. The lock nut 214 runs on external thread 504 of the spud 212 so as to ensure the crushing of the rubber grommet 213 and sealing against the leak path between the mating surfaces 501 of the spud 212 and the standard hole 105 of the rim 103. The standard hole 105 with a larger diameter is made to face tire cavity 102 of the rim 103. The size of the standard hole 105 is same as that for receiving the spud 212. This is to ensure that the safety disc holder 104 can be retrofit at the field when the customer decides so.

[00047] A main advantage of the present invention is that the safety disc holder
provides provisions for tire inflation and rupture disc.
[00048] Another advantage of the present invention is that the safety disc holder
is mountable at the site as a retrofit on the standard wheel rim without a need for
any special machining.
[00049] Yet another advantage of the present invention is that the safety disc
holder enables to release the excessive air pressure in the tire cavity. Additional
advantage of the present invention is that the safety disc holder avoids potential
tire burst and related accidents.
[00050] Still another advantage of the present invention is that the safety disc
holder allows replacing a rupture disc unit when the rupture disc bursts due to
excess air pressure inside the tire cavity.
[00051] Another advantage of the present invention is to provide a safety disc
holder that prevents unauthorized removal or theft of rupture disc unit from the
wheel at site.
[00052] The foregoing description of the specific embodiments will so fully
reveal the general nature of the embodiments herein that others can, by applying
current knowledge, readily modify and/or adapt for various applications such
specific embodiments without departing from the generic concept, and, therefore,
such adaptations and modifications should and are intended to be comprehended
within the meaning and range of equivalents of the disclosed embodiments. It is to
be understood that the phraseology or terminology employed herein is for the
purpose of description and not of limitation. Therefore, while the embodiments
herein have been described in terms of preferred embodiments, those skilled in the

art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.

A safety disc holder 104 for avoiding potential tire burst and unwanted site
accidents in a vehicle wheel rim 103, wherein the safety disc holder 104
comprises of,
a rupture disc 204;
characterized in that
the safety disc holder 104 further includes a main housing 201, a valve
core housing 202 and a rupture disc unit 203;
wherein the main housing 201 includes a male portion 209 for mounting
the safety disc holder in the rim 103 and provisions to receive the valve
core housing 202 and the rupture disc unit 203;
wherein the rupture disc unit 203 includes the rupture disc 204.
The safety disc holder as claimed in claim 1, wherein the rim 103 provided
with a standard hole 105 for mounting the safety disc holder 104.
The safety disc holder 104 as claimed in claim 1, wherein the main
housing 201 configured to accept the valve core housing 202 for tire
inflation.
The safety disc holder 104 as claimed in claim 1, wherein the main
housing 201 configured to accept the rupture disc unit 203 for preventing
excess air pressure build-up inside tire cavity.
The safety disc holder 104 as claimed in claim 1, wherein the main
housing 201 further includes at least three opening; wherein the rupture
disc unit 203 is connected to a first opening 207 of the main housing 201;
wherein the valve core housing 202 is connected to a second opening 208

of the main housing 201; and wherein a third opening 209 (a) of the main
housing 201 is connected to the tire cavity when the male portion 209 of
the main housing 201 mounted to the rim 103.
The safety disc holder 104 as claimed in claim 1, wherein a lock plate 218
is disposed on the main housing 201 to prevent unauthorized removal of
rupture disc unit 203.
The safety disc holder 104 as claimed in claim 1, wherein the rupture disc
unit 203 further includes a muffled outlet 205.
The safety disc holder 104 as claimed in claim 7, wherein the muffled
outlet 205 includes at least a cross hole 206 on its surface to release excess
air to atmosphere.
The safety disc holder 104 as claimed in claim 1, wherein the rupture disc
unit 203 is replaceable when the rupture disc 204 bursts due to excess air
pressure inside the tire cavity.
). The safety disc holder 104 as claimed in claim 1, wherein the valve core housing 202 includes a valve core housing seal 210 and a swivel nut 211.
I. The safety disc holder 104 as claimed in claim 1, wherein the safety disc holder 104 further includes at least one spud 212, at least one rubber grommet 213, at least one lock nut 214 and at least one static seal 215.
I. The safety disc holder 104 as claimed in claim 11, wherein the spud 212 is provided with threads on its external and internal surfaces; and wherein the external thread 504 machined to match the lock nut 214 and internal thread machined to match the threads on the main housing 201.
5. The safety disc holder 104 as claimed in claim 11, wherein the rubber grommet 213 placed over external step of the spud 212; and wherein the

spud 212 with the rubber grommet 213 placed over the standard hole 105 of the rim 103.
The safety disc holder 104 as claimed in claim 11, wherein the static seal 215 disposed at chamfer 503 of the spud 212 to provide an air tight seal across the spud 212 and the main housing 201 interfaces.